John Insley has stated that "there is not a scrap of evidence for [a] 'Late British-derived Old English.'" Substantive verb – consuetudinal tense byð This claim depends on assuming that Old English is unusual as a Germanic language in its use of two forms of the verb to be; however, all other Germanic languages also exhibit the two verbs be with similar semantics, and so the evidence probably is more suggestive of a common inheritance than substratum influence – though this substratum influence could be claimed also for many parts of the European mainland, formerly Celtic but now Germanic. The b- form is used in a habitual sense and the 3rd person singular form, byð, has the same distinction of functions and is associated with a similar phonetic form in the Brittonic *bið (Welsh bydd, Middle Breton bout, Cornish boaz). Biðun, the 3rd person plural form, is also used in Northern texts and seems to parallel the Brittonic byddant. Though the claim is made that the biðun form is particularly difficult to explain as a Germanic language construct, but is consistent with the Brittonic system, the form fits into regular Germanic to Anglian sound changes. Transition to Middle English Change from syntheticism towards analyticism The development from Old English to Middle English is marked particularly by a change from syntheticism (expressing meaning using word-endings) to analyticism (expressing meaning using word order). Old English was a synthetic language, though its inflections already tended to be simpler than those of contemporary continental Germanic languages. There are different word endings for case (roughly speaking, endings for the direct object of a sentence, the subject of a sentence and similarly for two other grammatical situations (not including instrumental)) varying for plural forms, gender forms and two kinds of word form (called weak and strong). This system is partially retained in modern Germanic languages, especially German, Icelandic and Faroese. Brittonic, however, was already a highly analytic language and so Brittonic peoples may have had difficulty learning Old English. It has been suggested that the Brittonic Latin of the period demonstrates difficulty in using the Latin word endings. Some language innovations occurred primarily in texts from Northern and South-Western England – in theory, the areas with the greater density of Brittonic people. In the Northern zone of that period, there was partial replacement of the Anglo-Saxon rule by Norse invaders. This situation can variously be seen